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Full-Text Articles in Social and Behavioral Sciences
Coke Degradation Under Simulated Blast Furnace Conditions, Xing Xing, Harold P. Rogers, Guangqing Zhang, Kim Hockings, Paul Zulli, Oleg Ostrovski
Coke Degradation Under Simulated Blast Furnace Conditions, Xing Xing, Harold P. Rogers, Guangqing Zhang, Kim Hockings, Paul Zulli, Oleg Ostrovski
Faculty of Engineering and Information Sciences - Papers: Part A
Three metallurgical cokes made from coking coals over a significant range in rank were subjected to treatment with blast furnace-like gas composition-temperature profile to 1 673 K, annealing under N2 to 2 273 K and gasification with subsequent annealing at 1 873 and 2 273 K. The degradation of cokes after reaction and annealing was characterised using I-drum tumbling, tensile testing, ultra-micro indentation and X-ray diffraction. Both gasification and annealing decreased the mechanical strength of coke. Compared with annealing at 1 673 K, gasification at same temperature caused larger degradation for all three cokes, and the effect was more significant …
Macrostrength And Pore Structure Of Coke Subjected To Gasification And Annealing Under Blast Furnace Conditions, Xing Xing, Harold P. Rogers, Guangqing Zhang, Paul Zulli, Oleg Ostrovski
Macrostrength And Pore Structure Of Coke Subjected To Gasification And Annealing Under Blast Furnace Conditions, Xing Xing, Harold P. Rogers, Guangqing Zhang, Paul Zulli, Oleg Ostrovski
Faculty of Engineering and Information Sciences - Papers: Part A
Metallurgical cokes were subjected to gasification by CO-CO2-N2 gas with blast furnace-like composition-temperature profile to 1400 °C and annealing under N2 at temperature up to 2000 °C. The degradation of coke strength following reaction and annealing was characterised using tensile testing. Both gasification and annealing decreased the mechanical strength of coke. Degradation of all examined cokes by gasification at 1400 °C was stronger in comparison with annealing at the same temperature.
Compare Pilot-Scale And Industry-Scale Models Of Pulverized Coal Combustion In An Ironmaking Blast Furnace, Yansong Shen, Aibing Yu, Paul Zulli
Compare Pilot-Scale And Industry-Scale Models Of Pulverized Coal Combustion In An Ironmaking Blast Furnace, Yansong Shen, Aibing Yu, Paul Zulli
Faculty of Engineering and Information Sciences - Papers: Part A
In order to understand the complex phenomena of pulverized coal injection (PCI) process in blast furnace (BF), mathematical models have been developed at different scales: pilot-scale model of coal combustion and industry-scale model (in-furnace model) of coal/coke combustion in a real BF respectively. This paper compares these PCI models in aspects of model developments and model capability. The model development is discussed in terms of model formulation, their new features and geometry/regions considered. The model capability is then discussed in terms of main findings followed by the model evaluation on their advantages and limitations. It is indicated that these PCI …
Trace Elements In The Si Furnace. Part I: Behavior Of Impurities In Quartz During Reduction, Elena Dal Martello, Gabriella Tranell, Oleg Ostrovski, Guangqing Zhang, Ola Raaness, Rune Burg Larsen, Kai Tang, Pramod Koshy
Trace Elements In The Si Furnace. Part I: Behavior Of Impurities In Quartz During Reduction, Elena Dal Martello, Gabriella Tranell, Oleg Ostrovski, Guangqing Zhang, Ola Raaness, Rune Burg Larsen, Kai Tang, Pramod Koshy
Faculty of Engineering and Information Sciences - Papers: Part A
Quartz and carbonaceous materials, which are used in the production of silicon as well as electrodes and refractories in the silicon furnace, contain trace elements mostly in the form of oxides. These oxides can be reduced to gaseous compounds and leave the furnace or stay in the reaction products—metal and slag. This article examines the behavior of trace elements in hydrothermal quartz and quartzite in the reaction of SiO2 with Si or SiC. Mixtures of SiO2 (quartz or quartzite), SiC, and Si in forms of lumps or pellets were heated to 1923 K and 2123 K (1650°C and 1850°C) in …
Trace Elements In The Si Furnace-Part Ii: Analysis Of Condensate In Carbothermal Reduction Of Quartz, Elena Dal Martello, Gabriella Tranell, Oleg Ostrovski, Guangqing Zhang, Ola Raaness, Rune Berg Larsen, Kai Tang, Pramod Koshy
Trace Elements In The Si Furnace-Part Ii: Analysis Of Condensate In Carbothermal Reduction Of Quartz, Elena Dal Martello, Gabriella Tranell, Oleg Ostrovski, Guangqing Zhang, Ola Raaness, Rune Berg Larsen, Kai Tang, Pramod Koshy
Faculty of Engineering and Information Sciences - Papers: Part A
Silicon feedstock for production of solar-grade silicon should be as pure as possible to decrease the cost of manufacturing of solar cells. Impurities in quartz, carbonaceous materials, electrodes, and refractories are mostly present in the form of oxides. These oxides can be reduced to volatile gaseous compounds in presence of SiO(g) and CO(g) atmosphere and potentially leave the furnace or stay in the condensed reaction products, metal, and slag. This work investigates the conditions under which volatile impurities report to the gas phase in laboratory experiments with lumpy and pelletized mixtures of SiO2, SiC, and Si at 1923 K and …
Blast Furnace Hearth Refractory And Coke Ash Mineral Interactions, P B. Drain, M W. Chapman, R J. Nightingale, B J. Monaghan
Blast Furnace Hearth Refractory And Coke Ash Mineral Interactions, P B. Drain, M W. Chapman, R J. Nightingale, B J. Monaghan
Faculty of Engineering and Information Sciences - Papers: Part A
In the blast furnace hearth the calcium aluminate by-products of coke dissolution can react with the hearth refractories. Reactions between these coke ash minerals and the aluminosilicate and alumina-carbon hearth refractories may result in increased refractory wear reducing the blast furnace campaign life. Hence improved understanding of these interactions may have implications for the campaign life of the blast furnace hearth refractory materials. The interactions between the coke ash minerals and aluminosilicate hearth refractory have been assessed by heating samples of calcium aluminates (CA, CA2 & CA6) coupled with aluminosilicate refractory to temperatures representative of the blast furnace hearth (1450 …
Coke Microstructure And Strength Under Blast Furnace Conditions, Xing Xing, Guangqing Zhang, Harold Rogers, Paul Zulli, Oleg Ostrovski
Coke Microstructure And Strength Under Blast Furnace Conditions, Xing Xing, Guangqing Zhang, Harold Rogers, Paul Zulli, Oleg Ostrovski
Faculty of Engineering and Information Sciences - Papers: Part A
No abstract provided.
Numerical Investigation Of The Transient Multiphase Flow In An Ironmaking Blast Furnace, Zongyan Zhou, Haiping Zhu, Aibing Yu, Paul Zulli
Numerical Investigation Of The Transient Multiphase Flow In An Ironmaking Blast Furnace, Zongyan Zhou, Haiping Zhu, Aibing Yu, Paul Zulli
Faculty of Engineering and Information Sciences - Papers: Part A
Discrete particle simulation (DPS) has been applied to multiphase flow modelling in an ironmaking blast furnace (BF), including burden distribution at the top, gas-solid flow in the BF shaft and raceway, and liquid-solid flow in the hearth. In this work, the approach is further extended to take into account the transient features of gas and particle flow coupled with liquid tapping operation. In the simulation, two types of particles of coke and ore with different physical properties are considered, together with different shapes of the cohesive zone and the shrinkage of size of ore particles in the cohesive zone to …
Developments In Blast Furnace Process Control At Port Kembla Based On Process Fundamentals, Robert Nightingale, Rian Dippenaar, Wei-Kao Lu
Developments In Blast Furnace Process Control At Port Kembla Based On Process Fundamentals, Robert Nightingale, Rian Dippenaar, Wei-Kao Lu
Faculty of Engineering and Information Sciences - Papers: Part A
This article is based on a presentation made in the "Geoffrey Belton Memorial Symposium," held in January 2000, in Sydney, Australia, under the joint sponsorship of ISS and TMS.
The Interpretation Of Laser Sensing Measurements For Blast Furnace Operations And Control, Peter C. Wall, R J Turner, Mark Hughes, Peter Huk, Ross J. Haywood, M J Mccarthy, Paul Zulli
The Interpretation Of Laser Sensing Measurements For Blast Furnace Operations And Control, Peter C. Wall, R J Turner, Mark Hughes, Peter Huk, Ross J. Haywood, M J Mccarthy, Paul Zulli
Faculty of Engineering and Information Sciences - Papers: Part A
Several laser-based sensors for use on blast furnaces have been developed and implemented, including a raceway sensor, burden level sensor (single point) and burden surface profiler. These sensors are based on the time-of-flight technique and give high levels of accuracy in all applications. The data obtained from the sensors during normal furnace operations are examined in light of the process models utilised by operators and for the interpretation of pulverised coal injection performance. Raceway sensory data obtained during a furnace blow-in are also discussed.